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catar/decoder.rs: avoid slashes in file names

This commit is contained in:
Dietmar Maurer 2019-01-09 12:17:23 +01:00
parent 9b1bb5a277
commit 25f60394d2
1 changed files with 8 additions and 4 deletions
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12
src/catar/decoder.rs
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@ -120,7 +120,9 @@ impl <'a, R: Read + Seek> CaTarDecoder<'a, R> {
bail!("filename entry not nul terminated.");
}
// fixme: check filename is relative (not starting with /)
if buffer.iter().find(|b| (**b == b'/') || (**b == b'\\')).is_some() {
bail!("found invalid filename with slashes.");
}
Ok(std::ffi::OsString::from_vec(buffer))
}
@ -169,7 +171,9 @@ impl <'a, R: Read + Seek> CaTarDecoder<'a, R> {
let mode = entry.mode as u32; //fixme: upper 32bits?
if (mode & libc::S_IFMT) == libc::S_IFDIR {
let ifmt = mode & libc::S_IFMT;
if ifmt == libc::S_IFDIR {
let dir = match dir_mkdirat(parent_fd, filename) {
Ok(dir) => dir,
Err(err) => bail!("unable to open directory {:?} - {}", path, err),
@ -200,7 +204,7 @@ impl <'a, R: Read + Seek> CaTarDecoder<'a, R> {
}
}
if (mode & libc::S_IFMT) == libc::S_IFLNK {
if ifmt == libc::S_IFLNK {
// fixme: create symlink
//fixme: restore permission, acls, xattr, ...
let head: CaFormatHeader = self.read_item()?;
@ -222,7 +226,7 @@ impl <'a, R: Read + Seek> CaTarDecoder<'a, R> {
return Ok(());
}
if (mode & libc::S_IFMT) == libc::S_IFREG {
if ifmt == libc::S_IFREG {
let mut read_buffer: [u8; 64*1024] = unsafe { std::mem::uninitialized() };